Following infection with two H5N1 strains of avian influenza virus (A/duck/Hubei/49/05 and A/goose/Hubei/65/05), levels of expression of duck IFITM3, -5, and -10 (measured by RNAseq) were increased to various degrees, reflecting a response befitting their expected function (27). This evidence concerns the gene IFITM3 and infection.